DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 447: Rho* Scaling of Alfvenic Activity Using Hydrogen Discharge | ||
| Name: | Michael Van Zeeland ( |
Affiliation: | General Atomics |
| Research Area: | Hydrogen Discharges | Presentation time: | Not requested | Co-Author(s): | W. Heidbrink, R. Nazikian |
| Description: | The primary goal of this experiment is to document the difference in Alfvenic activity and resultant fast ion transport by repeating the well-documented deuterium AE discharge 122117 in hydrogen. | ||
| Experimental Approach/Plan: | Begin with discharge 122117 as a reference and repeat in hydrogen. Carry out beam power scan as well as density scan. Document the variation in AE activity as well as impact on fast ion transport for comparison to equivalent discharges already carried out in deuterium. | ||
| Background: | The fast ion gyroradius/plasma radius is thought to be fundamental in determining the degree to which Alfvenic activity or other MHD induced fast ion transport impacts plasma performance. Additionally, the most unstable mode is expected to occur when the poloidal wavelength is approximately the fast ion gyroradius. Both of these ideas are fundamental to making reliable projections to ITER. Operating the well-documented AE discharge 122117 in hydrogen will provide a sensitive test of both of these predictions since essentially all relevant parameters including V_beam/V_Alfven will remain constant except rho*. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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